High precision fiber waveguide arrays for coherent light propagation

In this paper, we fabricated successfully hexagonal fiber waveguide arrays with optimized structural properties by means of the well-known stack-and-draw technique. The package elements were prepared using high-grade raw materials. To analyze the coherence properties of light transport, we used array samples with different length and excited the central core at the input facet. At the output facet the intensity distribution was measured by a camera technique. The distribution pattern was then compared with computer simulations of coherent light propagation.